Fuel tank



FIG. 1 is a perspective view of the fuel tank showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right view thereof; and,

FIG. 7 is a left view thereof.

The broken lines shown in the drawings illustrate portions of the fuel tank that forms no part of the claimed design. 

CLAIM The ornamental design for a fuel tank, as shown and described. 